Segment Information (Tables)

6 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Schedule of segment reporting

	Three months ended				Six months ended
	June 30,				June 30,
		2021		2020		2021		2020
Marine
Contract revenues	$	63,942	$	91,719	$	136,088	$	177,668
Operating income	$	8,606	$	3,810	$	11,454	$	9,559
Depreciation and amortization expense	$	(4,322)	$	(4,744)	$	(8,680)	$	(9,520)
Total assets	$	253,658	$	233,326	$	253,658	$	233,326
Property and equipment, net	$	90,961	$	111,416	$	90,961	$	111,416
Concrete
Contract revenues	$	81,933	$	91,994	$	163,096	$	172,665
Operating income	$	(3,040)	$	274	$	(3,833)	$	(1,110)
Depreciation and amortization expense	$	(2,107)	$	(2,260)	$	(4,235)	$	(4,376)
Total assets	$	129,547	$	138,095	$	129,547	$	138,095
Property and equipment, net	$	13,956	$	15,555	$	13,956	$	15,555